Bob, There are a couple of things I don't understand about the new struct. Below is a test that fails. $ ./python ./Lib/test/regrtest.py test_tarfile test_struct test_tarfile /home/pybot/test-trunk/build/Lib/struct.py:63: DeprecationWarning: 'l' format requires -2147483648 <= number <= 2147483647 return o.pack(*args) test_struct test test_struct failed -- pack('>l', -2147483649) did not raise error 1 test OK. 1 test failed: test_struct #### I fixed the error message (the min value was off by one before). I think I fixed a few ssize_t issues too. The remaining issues I know of are: * The warning only appears on 64-bit platforms. * The warning doesn't seem correct for 64-bit platforms (l is 8 bytes, not 4). * test_struct only fails if run after test_tarfile. * The msg from test_struct doesn't seem correct for 64-bit platforms. I tracked the problem down to trying to write the gzip tar file. Can you fix this? n